<html>

<head>
  <title>File Upload</title>
</head>

<body>
  <form action="http://127.0.0.1:5000/upload" method="POST" enctype="multipart/form-data">
    <input type="file" name="file" />
    <input type="submit" value="提交" />
  </form>
</body>

</html>